IP Security - Protocol, RFC's and Papers


	P Layer-3 (Unicast) - Access control, authentication (data origin authentication and connectionless integrity), packet anti-replay protection, confidentiality through encryption, and limited traffic flow confidentiality.
	IPSec Microsoft links IPSec Cisco links IPSec Guides* links* http://www.VPNc.org
	Using IPSec, Win2K/XP 1 (pdf) Using IPSec, Win2K/XP 2 (pdf) Using IPSec, Win2K/XP 3 (pdf) IBM VPN Guide (pdf) IKE protocol (pdf) Cisco IPSec (pdf) IPSec Encryption (pdf) IPSec Linux (pdf) Common VPN Security Flaws (pdf) Key Exchange Thesis (pdf) Encryption/IPSec (pdf) Cryptography/IPSec Details (pdf) RandomNumbers (pdf) IPSec (doc) DH shockwave
	IPSec / IKE Tools
	IKE Scan DWN
	IKE Probe DWN
	IKE Crack DWN
	IPSecTrace DWN
	VPNMonitor DWN
	KeyMan (JAVA)

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	Microsoft TechNet - IPSecurity Cisco IPSec Support page IPSec - Arch, Modes, Protocols, Formats, IKE Exchanges Virtual Private Network Consortium, VPNC (International)
	SecurityFocus - IPSec in Windows, part I SecurityFocus - IPSec in Windows, part II SecurityFocus - IPSec in Windows, part III IBM Redbook - VPN Cross-Platform Management Architecture for Internet Key Exchange Protocol - IBM Cisco IPSec Network Security Cisco IPSec Encryption Implementing site-to-site IPSec (Cisco to Linux FreeS/WAN) IPSec Flaws - Whitepaper Diffie-Hellman Key Exchange: Theory and Practice Cryptography: Theory/Practice - Encryption in IPSec Cryptography 101, IPSec Intro Random Numbers in Cryptography- presentation Microsoft Windows Server 2003 - IP Protocol Security Diffie-Hellman Key Exchange - Shockwave

	IKE Scanning tool (Linux, Windows), cmd line IKE-scan tool does two things - Discovery: Determine which hosts are running IKE. This is done by displaying those hosts which respond to the IKE requests sent by ike-scan. Fingerprinting: Determine which IKE implementation the host(s) are using. This is done by recording the times of the IKE response packets from the target hosts and comparing the observed retransmission backoff pattern against known patterns.
	IKE Probe (PSK vulnerability Scanner), cmd line
	IKE Crack (calculates SKEYID / HASH_r), perl script IKECrack utilizies the HASH sent in Aggressive Mode, step 2, and attempts a real-time bruteforce of the PSK. This involves a HMAC-MD5 of the PSK with nonce values to determine the SKEYID, and a HMAC-MD5 of the SKEYID with DH pubkeys, cookies, ID, and SA proposal.
	IPSecTrace - profiles IPSec traffic in a pcap capture file
	VPN Monitor Tool - IPSec/PPTP net traffic observer
	KeyMan - PKI client tool, manages keys/certificates/CRLs KeyMan manages repositories which contain collections of keys, certificates, and revocation lists. A repository is called a token. A token comprises the trust settings for a particular application. Usually, a token contains private keys and the associated certificate chains to authenticate a user to other sites. In addition, a token holds certificates of trusted communication partners and certification authorities (CAs). KeyMan requires JDK 1.2 or higher.

	Wireshark Capture Filter (IPSec) ESP and IKE exchange traffic: ip proto 0x32 or dst port 500

IPSec Graphic

Multiple PDF Graphics - IPSec topics

(Restricted Access)

IPSec IKEv1 RFC's (IETF - Internet Engineering Task Force)

Security Architecture for the Internet Protocol (IKEv1)

IP Authentication Header (AH)

HMAC-MD5-96 within ESP an AH (Authentication)

HMAC-SHA-1-96 within ESP an AH (Authentication)

ESP DES-CBC Cipher Algorithm with Explicit IV (Encryption)

IP Encapsulating Security Payload (ESP)

IPSec Domain of Interpretation for ISAKMP (IPSec DOI) - key exchange

Internet Security Association & Key Management Protocol (ISAKMP)

Internet Key Exchange (IKEv1) Protocol

NULL Encryption Algorithm

IP Security Documentation Roadmap

OAKLEY Key Determination Protocol - IKE Key Exchange

ESP CBC-Mode Cipher Algorithms

Use of HMAC-RIPEMD-160-96 within ESP and AH

Modular Exponential Diffie-Hellman groups - (6) DH groups 5, 14-18

IPSec IKEv2 RFC's (IETF - Internet Engineering Task Force)

Security Architecture for the Internet Protocol (IKEv2)

IP Authentication Header (AH)

IP Encapsulating Security Payload (ESPv3)

Extended Sequence Number (ESN) Addendum to IPsec (DOI)

Cryptographic Algorithm Implementation Requirements for ESP and AH

Internet Key Exchange (IKEv2) Protocol

Cryptographic Algorithms for Use in the IKEv2

Cryptographic Suites for IPsec

Using Advanced Encryption Standard (AES) CCM Mode w IPsec ESP

Repeated Authentication in Internet Key Exchange (IKEv2) Protocol

IKEv2 Clarifications and Implementation Guidelines

Requirements for an IPsec Certificate Management Profile

Cryptographic Algorithm Implementation Requirements for ESP/AH

The Internet IP Security PKI Profile of IKEv1/ISAKMP, IKEv2, and PKIX

Related RFC's (IETF - Internet Engineering Task Force)

RFC 792

RFC 1112

RFC 2236

Internet Control Message Protocol (ICMP)

Host extensions for IP multicasting (IGMP)

Internet Group Management Protocol, Ver 2

By default, the SA proposal contains 8 transforms.

These 8 transforms represent all possible combinations of:

a) Encryption Algorithm: DES-CBC and 3DES-CBC;
b) Hash Algorithm: MD5 and SHA; and
c) DH Group: 1 (MODP 768) and 2 (MODP 1024).

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